Today, there are more than 1,000 sites throughout the world that are recognized as UNESCO World Heritage sites ... Stretching along the western edge of San Juan, Puerto Rico's capital island ...

100 B.C. to A.D. 1300, the Sierra de San Francisco (in the El Vizcaino ... collections of rock paintings in the world. They are remarkably well-preserved because of the dry climate and the ...

Locations deemed World Heritage sites are of "outstanding universal value to humanity" and should be "protected for future generations to appreciate and enjoy," according to Unesco. The ...